do it properly in copy and tell
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Answer:
a) -74
b) -9
Step-by-step explanation:
a) -2x (3x-4x)+2y(6y-9z)+2z(4z-x)
= -2×(-1)(3×+1-4×+2)+2×-2(6×-2-9×2)+2×2(4×2-(-1)
= 2×5+(-4)×(-30)+4×9
= -74
b) 7×-1-2×1
=-9
Hope you find helpful ☺️
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